NB-IoT系统随机接入过程的设计与实现  

Design and Implementation of NB-IoT System Random Access Process

作　　者：张德民[1] 张颖[1] 周述淇 舒强[1] ZHANG De-min;ZHANG Ying;ZHOU Shu-qi;SHU Qiang(Chongqing Key Lab of Mobile Communication Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,Chin)

机构地区：[1]重庆邮电大学重庆市移动通信技术重点实验室,重庆400065

出　　处：《光通信研究》2018年第4期74-78,共5页Study on Optical Communications

基　　金：国家科技重大专项基金资助项目(2012ZX03001024;2017ZX03001021)

摘　　要：基于蜂窝网络的窄带物联网(NB-IoT)的随机接入过程相对于长期演进(LTE)而言,进行了大量简化,同时针对NB-IoT系统的相关特性也作了适当修改。文章详细分析了NB-IoT系统中基于竞争模式的随机接入过程,包括覆盖等级选择、资源配置和实现流程等;对NB-IoT新添加的挂起与恢复过程进行了系统研究,并设计了相应的流程图。基于测试及测试控制表示法第3版(TTCN-3)测试平台,搭建了一致性测试环境,对随机接入过程进行了测试,测试结果与预期结果相同,验证了其与标准的一致性。Cellular network based random access process of the Narrow Band Internet of Things （NB IoT） is much simpler than Long Term Evolution （LTE）. It is also appropriately modified for its features. In this paper, the random access process based on competitive mode in NB loT system is analyzed in detail, including coverage level selection, resource allocation, implemen ration process and so on. At the same time, the newly added suspend and resume process of NB loT is systematically studied, and the corresponding flow chart is designed. Based on the TTCN 3 test platform, a conformance test environment is built, and the random access process is tested. The test results are the same as the expected results, which verify the consistency with the standard.

关 键 词：窄带物联网 随机接入 媒体接入控制 无线资源控制 

分 类 号：TN929.5[电子电信—通信与信息系统]